There’s nothing like a sunny day to fill up on vitamin D. Studies show that when 22 percent of unprotected skin (no clothing or sunscreen) is exposed to the sun, 1000 IU of vitamin D is synthesized in 10-15 minutes. The Recommended Dietary Allowance (RDA) for adults ranges from 600 to 800 IU daily.

But when the clouds roll in or the days are too cold to expose skin to the sunshine, it’s time to supplement your diet with foods high in vitamin D, such as salmon, tuna fish, sardines, cod liver oil, and dairy and orange juice products fortified with vitamin D.

If your food product—when served in an FDA-recommended serving size—provides 10 percent of the RDA for vitamin D, you can make a “good source” nutrient content claim. And if it provides 20 percent or more, then you qualify to make an “excellent source” claim. Need help determining the amount of vitamin D in your foods? Contact us today.